import {v4 as uuidv4} from 'uuid';
//要生成一个随机字段串, 且每次执行不能发生变化, 游客身份持久存储
export const getUUID = () => {
    let uuid_token = localStorage.getItem('UUIDTOKEN');
    //如果没有生成
    if (!uuid_token) {
        uuid_token = uuidv4();
        localStorage.setItem('UUIDTOKEN', uuid_token);
    }
    return uuid_token;
};